Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 353
342 MILL AND FACTORY APPLIANCES. 1423. SEAMLESS TUBE MAKING.—The Mannesmann process. A, «, conical corrugated rolls: B, guide tube; B, hot bar of iron or steel being pushed throughthe rolls; D, mandrill for wideningthe inside of the tube, the hollow be-ing started by the action of the out-side…
Mechanical movements
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